Glomerular fi ltration rate can be altered by all of the following EXCEPT one. Which one? A. constriction of renal tubule by macula densa B. vasoconstriction of afferent arteriole C. decrease in concentration of plasma proteins D. vasoconstriction of efferent arteriole
Option A. Macula densa does now no longer constrict the tubule. A lower in plasma protein could increase the osmotic pressure opposing glomerular filteration.
